Hi Justin, we’ve run across those a number of times. What we’ve used in the past is a flat head screwdriver. A hammer head scraper for removing caulking and sometimes just a paint stick and a vacuum.
Re-grout is usually a dusty pain in the butt job grinding it out with an angle grinder & diamond blade.
This one sounds easy but they don’t know that.
I typically charge almost the same as Diamond Honing and Polishing a floor. $3.5 to $4 per square foot.

Tony DeLuna
925-625-9625
www.PatriotStoneRestoration.com

> On Sep 26, 2019, at 9:18 AM, Hector Castillo <hectorcastillo@comcast.net> wrote:
>
> Hello Justin
> I think too much water when mailing grout
>
> Sent from my iPhone
>
>> On Sep 26, 2019, at 8:50 AM, Justin Cameron <Justin@jmcstoneandtilecare.com> wrote:
>>
>> Customers floor is 4 years old and all the grout is falling apart. You can literally scratch it out with your finger nail. What would be the cause of this ?  Not hollow tiles either and it’s all over.
>> What would you guys charge to remove grout on 850 sqft of 18 inch porcelain tile and re grout ?
>> What methods you guys using out there to remove grout efficiently.
>> Thank you
>>
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>> Sent from my iPhone
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